diff --git a/Sources/App/Error.swift b/Sources/App/Error.swift
index 6e93861..55ad49c 100644
--- a/Sources/App/Error.swift
+++ b/Sources/App/Error.swift
@@ -10,11 +10,40 @@ import Vapor
 
 enum CapError: Error {
     
+    /**
+     
+     HTTP Code: 404
+     */
     case unknownId
+    
+    /**
+     
+     HTTP Code: 400
+     */
     case invalidBody
+    
+    /**
+     
+     HTTP Code: 409
+     */
     case dataInconsistency
+    
+    /**
+     
+     HTTP Code: 412
+     */
     case invalidFile
+    
+    /**
+     
+     HTTP Code: 500
+     */
     case invalidConfiguration
+    
+    /**
+     
+     HTTP Code: 406
+     */
     case invalidData
     
     var response: HTTPResponseStatus {
diff --git a/Sources/App/routes.swift b/Sources/App/routes.swift
index c8ef39a..819310b 100755
--- a/Sources/App/routes.swift
+++ b/Sources/App/routes.swift
@@ -1,14 +1,15 @@
 import Vapor
+import Foundation
 
 /// The decoder to extract caps from JSON payloads given to the `cap` route.
 private let decoder = JSONDecoder()
 
 private func authorize(_ request: Request) throws {
     guard let key = request.headers.first(name: "key") else {
-        throw Abort(.badRequest)
+        throw Abort(.badRequest) // 400
     }
     guard server.hasAuthorization(for: key) else {
-        throw Abort(.forbidden)
+        throw Abort(.forbidden) // 403
     }
 }
 
@@ -45,21 +46,22 @@ func routes(_ app: Application) throws {
     }
     
     // Update the classifier
-    app.postCatching("classifier", ":version") { request in
+    app.on(.POST, "classifier", ":version", body: .collect(maxSize: "50mb")) { request -> HTTPStatus in
         try authorize(request)
         guard let version = request.parameters.get("version", as: Int.self) else {
             log("Invalid parameter for version")
             throw Abort(.badRequest)
         }
         guard version > server.classifierVersion else {
-            throw Abort(.alreadyReported)
+            throw Abort(.alreadyReported) // 208
         }
         guard let buffer = request.body.data else {
             log("Missing body data: \(request.body.description)")
             throw CapError.invalidBody
         }
         let data = Data(buffer: buffer)
-        try server.save(image: data, for: version)
+        try server.save(classifier: data, version: version)
+        return .ok
     }
     
     // Update the trained classes